1.1.1 Elements, Compounds, and Mixtures

• Elements can be broken down into simpler substances by chemical means.

  False
• What is the chemical formula for water?

  $H_{2}O$
• Mixtures are substances where components are chemically bonded together.

  False
• A compound has a unique set of physical and chemical properties
• Compounds have the same properties as their constituent elements.

  False
• What is a compound formed when two or more elements are chemically bonded?

  Pure substance
• Components in a mixture retain their individual properties.

  True
• Arrange the following substances based on their composition:

  1️⃣ Element (single type of atom)

  2️⃣ Compound (two or more elements chemically bonded)

  3️⃣ Mixture (two or more elements or compounds physically combined)
• What type of substance can be separated by physical methods?

  Mixture
• What is formed when two or more elements combine chemically in fixed proportions?

  Compound
• Elements can be broken down into simpler substances by chemical means.

  False
• Water is a compound formed from hydrogen and oxygen
• The components of a mixture can be separated by physical means.
• What is the composition of a compound?

  Two or more elements chemically bonded
• What type of mixture is distillation best suited for separating?

  Liquids with different boiling points
• What is the composition of an element?

  Atoms of the same type
• Compounds are formed when elements are chemically bonded in fixed proportions.


  True
• Order the substances based on their method of breakdown.

  1️⃣ Element: Cannot be broken down chemically

  2️⃣ Compound: Can be broken down chemically

  3️⃣ Mixture: Can be separated physically
• What is an example of a mixture?

  Air
• How are elements bonded together in a compound?

  Chemically bonded
• Compounds cannot be broken down chemically.

  False
• What is a mixture composed of two or more elements or compounds that are not chemically bonded?

  Substance physically combined
• Compounds can be broken down into their constituent elements through chemical reactions
• What type of substance cannot be broken down by chemical means?

  Element
• Elements are made up of atoms of the same type
• What makes each element unique?

  Unique properties
• How do mixtures differ from compounds in terms of bonding?

  No chemical bonds
• Match the substance with its correct classification:

  Hydrogen ↔️ Element

  Water ↔️ Compound

  Air ↔️ Mixture
• Order the steps to separate a mixture using filtration:

  1️⃣ Prepare the mixture

  2️⃣ Pass the mixture through a filter

  3️⃣ Collect the filtrate

  4️⃣ Retain the residue
• Elements are made up of atoms of the same type
• A compound is composed of two or more types of atoms
• Match the substance with its property:

  Element ↔️ Single type of atom

  Compound ↔️ Two or more elements chemically bonded

  Mixture ↔️ Two or more elements or compounds physically combined
• Order the substances based on their bonding type.

  1️⃣ Element: No bonding

  2️⃣ Compound: Chemical bonding

  3️⃣ Mixture: No chemical bonds
• Water is a compound formed from hydrogen and oxygen
• Sodium chloride is a compound formed from sodium and chlorine
• Air is a mixture of nitrogen, oxygen, and other gases
• What is a pure substance made up of only one type of atom?

  Element
• Brass is a mixture of copper and zinc
• What is an element defined as?

  Pure substance with atoms
• Compounds have properties identical to their constituent elements.

  False